Fujitsu Corporation

Tamotsu Amamoto

Hiroaki Natori

Masashi Murakumo

Osamu Ikeda

Hiroyuki Nakashima

Kunihiro Ikeda

Yutaka Maruta

Nobumasa Sasaki

Shinji Hidaka

In order to improve an identification accuracy of a backlit number plate in a vehicle identification method and device which recognize a vehicle number from a number plate of a vehicle whose image is taken, an image frame of a vehicle is taken by an interlace method, irradiation is performed in an odd field and an even field composing the image frame with light of light quantities different from each other, images of the odd field and the even field are captured, and character recognition processing, only when character recognition processing of a number plate area extracted from an image of one field has ended in failure, of a number plate area extracted from an image of the other field is performed. Also, character recognition processings of number plate areas extracted from the images of the odd field and the even field respectively are performed in parallel, and a result of character recognition processing, only when character recognition processing of a number plate area extracted from an image of one field has ended in failure, of a number plate area extracted from an image of the other field, is adopted as an identification result of the vehicle.

Vehicle identification method and device

In an irradiation control device which extends a longevity of an LED, a feedback control is performed to an irradiating portion by an output signal of a photo device provided in relation to the irradiating portion, thereby making brightness fixed. Alternatively, by performing image processing to an image taken by a camera, brightness on a screen is calculated, so that a feedback control is performed to the irradiating portion to make the brightness fixed. Alternatively, based on a recognition rate upon character recognition within the image taken by the camera, a feedback control is performed to the irradiating portion to make the brightness fixed.

Irradiation control device

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Yokohama, Japan

Tamotsu Amamoto